package com.hckjsec.law.WebSocket;

import com.alibaba.fastjson.JSON;
import com.hckjsec.common.utils.http.HttpUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CopyOnWriteArraySet;

@ServerEndpoint("/law/websocket/{sid}")
@Component
public class WebLawSocketServer {
    private static final Logger log = LoggerFactory.getLogger(HttpUtils.class);
    //静态变量，用来记录当前在线连接数。应该把它设计成线程安全的。
    private static int onlineCount = 0;
    //concurrent包的线程安全Set，用来存放每个客户端对应的MyWebSocket对象。
    private static CopyOnWriteArraySet<WebLawSocketServer> webSocketSet = new CopyOnWriteArraySet<WebLawSocketServer>();
    //与某个客户端的连接会话，需要通过它来给客户端发送数据
    private Session session;
    //接收sid
    private String sid="";
    //useridList
    private static List<String> userList = new ArrayList<>();
    /**
     * 连接建立成功调用的方法*/
    @OnOpen
    public void onOpen(Session session,@PathParam("sid") String sid) {
        this.session = session;
        webSocketSet.add(this);     //加入set中
        addOnlineCount();           //在线数加1
        log.info("有新窗口开始监听:"+sid+",当前在线人数为" + getOnlineCount());
        this.sid=sid;
        try {
            userList.add(sid);
            sendMessage(new WebLawSocketMessage("连接成功"));
        } catch (IOException e) {
            log.error("websocket IO异常");
        }
    }

    /**
     * 连接关闭调用的方法
     */
    @OnClose
    public void onClose() {
        webSocketSet.remove(this);  //从set中删除
        subOnlineCount();           //在线数减1
        List<String> findUserList = new ArrayList<>();
        for (String userId : userList){
            if (!userId.equals(sid)){
                findUserList.add(userId);
            }
        }
        this.userList = findUserList;
        log.info("有一连接关闭！当前在线人数为" + getOnlineCount());
    }

    /**
     * 收到客户端消息后调用的方法
     *
     * @param message 客户端发送过来的消息*/
    @OnMessage
    public void onMessage(String message, Session session) {
        log.info("收到来自窗口"+sid+"的信息:"+message);
        //群发消息
        for (WebLawSocketServer item : webSocketSet) {
            try {
                item.sendMessage(message);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    public  static synchronized void sendLawMsg(String type,String message,List<String> sidList,Long id){
        WebLawSocketMessage webLawSocketMessage = new  WebLawSocketMessage("web",type,message);
        webLawSocketMessage.setId(id);
        sendInfo(webLawSocketMessage,sidList);
    }


    /**
     *
     * @param session
     * @param error
     */
    @OnError
    public void onError(Session session, Throwable error) {
        log.error("发生错误");
        error.printStackTrace();
    }

    /**
     * 实现服务器主动推送
     **/
    public void sendMessage(Object object) throws IOException {
        String message=JSON.toJSONString(object);
        this.session.getBasicRemote().sendText(message);
    }

    /**
     * 群发自定义消息
     * */
    public static void sendInfo(Object object,List<String> sidList) {
        for (WebLawSocketServer item : webSocketSet) {
            try {
                if(sidList.contains(item.sid)){
                    item.sendMessage(object);
                }
            } catch (IOException e) {
                continue;
            }
        }
    }

    public static synchronized int getOnlineCount() {
        return onlineCount;
    }

    public static synchronized void addOnlineCount() {
        WebLawSocketServer.onlineCount++;
    }

    public static synchronized void subOnlineCount() {
        WebLawSocketServer.onlineCount--;
    }
}
